Method for mounting form-wound coils or tooth-wound coils

Abstract

In a method for mounting a prefabricated form-wound coil or tooth-wound coil on a layered laminated core to form a stator segment or stator, the form-wound coil or tooth-wound coil is insulated with insulation. Laminates are punched and stacked to form partial laminated cores and/or a laminated core, with the partial laminated cores being spaced apart from one another by spacers and forming substantially axially extending open slots of the laminated core. The form-wound coil or tooth-wound coil are radially inserted into the slots such as to embrace a tooth of the laminated core, and a removable auxiliary element is placed at an axial end face of the laminated core to protect the insulation of the form-wound coil or tooth-wound coil as the form-wound coil or tooth-wound coil is radially inserted into the slots. The auxiliary element is radially removed and repositioned on a further tooth of the laminated core.

Claims

1. A method for mounting a prefabricated coil on a layered laminated core to form a stator segment of a stator or a stator, said method comprising: producing a coil with insulation; forming the layered laminated core which includes a plurality of partial laminated core sections, wherein the partial laminated core sections are spaced apart from one another by spacers and forming substantially axially extending open slots of the layered laminated core; radially inserting the coil into the open slots such as to embrace a tooth of the layered laminated core; placing a removable auxiliary element at an axial end face of the layered laminated core to protect the insulation of the coil is radially inserted into the open slots; and radially removing the auxiliary element and repositioning the auxiliary element on a further tooth between the open slots of the layered laminated core.

2. The method of claim 1, further comprising arranging the auxiliary element on a first one of the plurality of partial laminated core sections of the layered laminated core or a last one of the plurality of partial laminated core sections of the layered laminated core.

3. The method of claim 1, further comprising positioning the auxiliary element on a finger of a pressure plate of a partial laminated core section of the plurality of partial laminated core sections at the axial end face of the layered laminated core.

4. The method of claim 3, further comprising arranging the auxiliary element on one of the spacers between a partial laminated core section of the plurality of partial laminated core sections.

Description

BRIEF DESCRIPTION OF THE DRAWING

(1) The invention and further advantageous configurations of the invention are explained in more detail by way of schematically illustrated exemplary embodiments; in the figures:

(2) FIG. 1 shows a perspective illustration of a stator segment,

(3) FIG. 2 shows a partial laminated core,

(4) FIG. 3 shows an auxiliary element on a tooth,

(5) FIG. 4 shows a basic mounting operation,

(6) FIG. 5 shows the placement of a tooth-wound coil in slots of a laminated core,

(7) FIG. 6 shows a schematically illustrated wind turbine.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

(8) FIG. 1 shows a perspective illustration of a stator segment 5, with a tooth-wound coil 16 in a slot 6. The laminated core 26 is subdivided into partial laminated cores 12, which are spaced apart from one another by means of spacers 8.

(9) FIG. 2 shows a partial laminated core 12 at an axial end of the laminated core 26, wherein the partial laminated core 12 has a pressure plate 1 with pressure fingers 2, which serve to compact the laminated core 26. Arranged on one pressure finger 2 is an auxiliary element 7, which is shown in more detail in FIG. 3.

(10) The auxiliary element 7 has a basic triangular shape, wherein the triangle has two identical leg sides 15, which each have a kink 18 in the upper part. This kink 18 makes it easier to guide a form-wound coil or a tooth-wound coil 16 onto the tooth 3 or into the slot 6.

(11) The auxiliary element 7 should have a good sliding capability in particular above the kink 18, in order to avoid tilting of the coil during the mounting process. The auxiliary element 7 is made from a slidable material, such as glass reinforced laminate or PTFE or some other hard plastic. It can also be made from a metal, in particular steel.

(12) Optionally, a coating, for example a sliding film, can be provided in the upper part of the leg sides 15, this further improving the sliding capability. This coating can be replaced when it becomes worn.

(13) Snap-fitting elements 27 can improve the temporary fixing of the auxillary elements 7 in recesses 24 of the tooth 3 (FIG. 3) or on the pressure finger 2.

(14) The tooth width 4, in particular in the region of the tooth head 13, is the same as or slightly less (about 0 to 3 mm depending on the dimension of the arrangement) than the width 10 of the auxiliary element 7 in this region. In this way, contact of the insulation with the edges of the tooth head 13 is always avoided during mounting.

(15) In other words, the width 10 of the auxiliary element 7 is thus the same as the tooth width 4 or slightly greater. In order to be able to improve removal after the mounting of the auxiliary element 7, an eye 11 is provided in the upper region of the auxiliary element 7.

(16) FIG. 4 shows a basic mounting process, in which a tooth-wound coil 16 is placed in the slots 6. An auxiliary element 7 having a width 10 is positioned on the pressure fingers 2 and thus prevents contact of the insulation of the coil 16 with the edges of the laminated core 26 or partial laminated core 12.

(17) Once the mounting of the one tooth-wound coil 16 has been completed, according to FIG. 5, the auxiliary element 7 is removed with the aid of a cutout 11, in particular an eye, and placed on the adjacent or another of the pressure fingers 2 and thus the procedure of radially introducing the coils 16 is repeated.

(18) For each coil, at least two auxiliary elements 7 are necessary, which are each arranged on an end face of the laminated core 26 for the mounting process.

(19) Thus, a stator or a stator segment 5 or stator segments 5 is/are now provided for a generator 21 of a wind turbine 20 according to FIG. 6 with air cooling, in which cooling air 23 is guided via gaps between the partial laminated cores 12 of the laminated core 26 in order to cool the stator.